Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Qual é a data de listagem da Ponte B & O em Washington?
 ###Tabelas: CREATE TABLE composition_of_the_17th_seanad (composition_of_the_17th_seanad_id AUTO_INCREMENT PRIMARY KEY, Administrative Panel INT, Agricultural Panel INT, Cultural and Educational Panel INT, Industrial and Commercial Panel INT, Labour Panel INT, National University of Ireland INT, University of Dublin INT, Nominated by the Taoiseach INT, Total INT) CREATE TABLE passing_rates (passing_rates_id AUTO_INCREMENT PRIMARY KEY, Exam VARCHAR, 2006 First Time VARCHAR, 2006 All VARCHAR, 2007 First Time VARCHAR, 2007 All VARCHAR, 2008 First Time VARCHAR, 2008 All VARCHAR, 2009 First Time VARCHAR, 2009 All VARCHAR, 2010 First Time VARCHAR, 2011 First Time VARCHAR, 2012 First Time VARCHAR) CREATE TABLE strong_verb_vowel_alternation_table (strong_verb_vowel_alternation_table_id AUTO_INCREMENT PRIMARY KEY, Inf. Stem VARCHAR, Sing. Pres. VARCHAR, Plur. Pres. VARCHAR, Sing. Pret. VARCHAR, Plur. Pret. VARCHAR, Subj. Pres. VARCHAR, Subj. Pret. VARCHAR, Past Part. VARCHAR) CREATE TABLE planetary_system (planetary_system_id AUTO_INCREMENT PRIMARY KEY, Companion (in order from star) VARCHAR, Mass VARCHAR, Semimajor axis ( AU ) VARCHAR, Orbital period ( s day ) VARCHAR, Eccentricity VARCHAR, Inclination VARCHAR) CREATE TABLE  (_id AUTO_INCREMENT PRIMARY KEY, Name VARCHAR, Built VARCHAR, Listed VARCHAR, Location VARCHAR, County VARCHAR)  
SELECT Listed FROM  WHERE County = washington AND Name = b & o bridge